added xml, json, css, and js to supported media "file" types
added xml, json, css, and js to supported media "file" types

Pumpapa/jacinthawalters.nl,Vivalldi/grav,getgrav/grav,toovy/grav,Sommerregen/grav,sylvestrelucia/grav,Pumpapa/lucaswalters.nl,getgrav/grav,jeffam/grav,jeremykenedy/grav,joeyhenricks/a-broke-vegan,enko/datenknoten.me,qbi/datenknoten.me,attiks/grav,userfrosting/learn,webuxr/iamrs,VillainyStudios/grav,undesign/undesign.github.io,userfrosting/learn,shortsofia/testesitegrav.github.io,userfrosting/learn,userfrosting/learn,sylvestrelucia/grav,frlan/datenknoten.me,JamesPan/gravbox,notklaatu/grav,enko/datenknoten.me,Silwereth/grav,iMoonThailand/grav,toovy/grav,Pumpapa/chriswalters.nl,z3cka/grav,enko/datenknoten.me,qbi/datenknoten.me,notklaatu/grav,dimayakovlev/grav,sylvestrelucia/grav,enko/datenknoten.me,beacloudgenius/grav,tomzx/blog.tomrochette.com,Pumpapa/lucaswalters.nl,joeyhenricks/a-broke-vegan,frlan/datenknoten.me,tomzx/blog.tomrochette.com,JamesPan/gravbox,tcsizmadia/grav,lennerd/grav,gigago/grav,DonLiborio/grav,dimayakovlev/grav,stell/grav,sylvestrelucia/grav,Vivalldi/grav,undesign/undesign.github.io,frlan/datenknoten.me,JamesPan/gravbox,qbi/datenknoten.me,Pumpapa/lucaswalters.nl,qbi/datenknoten.me,tomzx/blog.tomrochette.com,jinxboy13/grav,JamesPan/gravbox,ccardinaux/grav-test,nunull/grav,chkir/grav,TheHiddenHaku/alessiobottiroli-website-grav,tomzx/blog.tomrochette.com,davistech/grav,frlan/datenknoten.me